Few creative ideas

Use Electric Cars
my personal, preferred solution would be use nuclear power. I always was thinking if we can reduce the size of Nuclear power generator so that it can fit the car. But this one is not bad either.
Use Nuclear power to generate electricity. and use electricity to run Cars.

Air Cars:
I was browsing internet and found so many material, where people are trying air to use to drive car. its practicle. we all have seen small and big power tools working with Compressed air, didnt we? Its not new technology. i am surprised why we havent have used it in car so far.

http://en.wikipedia.org/wiki/Air_engine

http://www.livescience.com/imageoftheday/siod_041209.html
The Air Car is a six passenger, multi-use commuter vehicle being developed by European firm MDI. It runs entirely on compressed air.
The vehicle may soon be available in the United States, company officials say, and they're promoting it as a viable alternative at a time of rising gas prices.
Designed for use as a family car, mini-delivery van and taxi, the Air Car has an estimated range of 124 to 186 miles (100-300 kilometers) on a charge of compressed air. It has a top speed of 68 mph (110k/hr). Recharging the tank takes about 4 hours.
The Air Car's built-in compressor can be powered by any electricity source. It's builders tout the fact that one need not worry about battery life. The expansion of air drives the engine's pistons.